Mentor



C. L. BAMBRICK. DEVICE FOR DEVELOPING ROLL FILMS.

APPLICATION FILED AUG-24,1918.

Patented Nov. 18, 1919.

Ill.

IIVI/ENTOR WITNESSES ATTORNEYS CHARLES LOUIS BAMBRICK, 0F BROOKS, ALBERTA, CANADA.

DEVICE FOR DEVELOPING ROLL-FILMS.

Specification of Letters Patent.

Patented Nov. 18, 1919.

Application filed August 24, 1918. Serial No. 251,306.

To all whom it may concern:

Be it known that I, CHARLES L. BAMBRIO'K, a citizen of the Dominion of Canada, and a resident of Brooks, in the Province of Alberta and Dominion of Canada, have invented a new and Improved Device for Developing Roll-Films, of .which the following is a full, clear, and exact description.

This invention relates to devices for holding films while being developed and has for an object the provision of an improved structure which will hold any length of film whereby the same may be readily dipped or submerged in the developing solution while occupying a minimum space.

Another object is to provide a holding device for use in developing a roll of films, in which the film is held in a looped position without creasing so that it may all be placed in the solution substantially at the same time and held therein for the proper period of time without any chance of sticking to supporting members.

A further object of the invention is to provide a holder which is arranged to receive the ends of a roll of films and which is automatically adjusted for holding the film comparatively taut without creasing the same while being passed through the developing or fixing solution.

In the accompanying drawing:

Figure 1 is a front view of the device embodying the invention.

Fig. 2 is a longitudinal vertical section through the structure shown in Fig. 1, the same being taken on line 22.

Fig. 8 is a transverse sectional View through Fig. 1 on line 33.

Referring to the accompanying drawing by numerals, 14 indicates what may be termed a base formed as a solid strip of metal or other desired material and pro vided with hinge members 15 and 16 which are loosely hinged in place and are adapted to be clamped against the edges of the film 17 by reason of the number of spring clamps 18. One end of the film is held loosely adjacent the end 19 of body 14: and then the film is looped over the opposite end 20 so as to provide a small loop 21 and then brought back as far as it will extend over the rear face of the body 14. The hinge clamping members 15 and 16 are then pressed against the edges of the film and the springs 18 placed in position, if not already in position. This will hold the film so as to readily receive developing solution when the device issubmerged therein without any danger of the film sticking to the su aporting member as the sensitive face of the lm is facing outwardly.

In the developing devices now 011 the market an apron or other supporting means is provided for holding the film as it is passed through the solution and quite often the film sticks to the apron so that one or more pictures are injured. In addition it takes a certain quantity of solution for a film developed in the old way using a guiding apron whereas by using the holder described a number of films may be developed in the same quantity of solution.

The film in operation is taken from the camera, unrolled and then placed directly on the holder, after which the hinged members 15 and 16 are swung to a position over the edge of the film and the springs 18 placed in position, the holder together with the film is then submerged for any desired length of time in a developing solution. If desired the film may be readily mounted on the holder in the dark room either with or without a red light as the operation of plac ing the film in position and arranging the hinge members may be readily done without looking at the device.

W hat I claim is:

1. A holder for films comprising a base for receiving a film folded once, a pair of hinge members connected with said base engaging the edge of said film for holding the film in place, and clamping means engaging the hinge members for locking the hinge members in position.

2. A holder for films for holding the film during the time of development comprising a base adapted to receive a looped film, a clamping member arranged on each side and each face of said base for clamping the edges of said film, and resilient means acting on said clamping means for holding the same firmly against said film.

CHARLES LOUIS BAMBRICK. 

